It seems to me that your bunny’s sudden change in behaviour has been caused by you rearranging your furniture. My bunny is very sensitive to any changes in my room, even me putting the chair or the shoes in a different place or leaving some clothes on the floor. When I come to think of it, he pretty much checks the whole place out almost every day and leaves his scent on every item that has been positioned differently. He also likes testing things by jumping on items that have been moved. He is quite curious and he will notice every little change.
I think your bunny didn’t like that you moved things. By peeing on your bed he wants to tell you he is the boss and also leave his scent to claim it as his. Apparently bunnies sometimes lick, chew or nibble on your clothes or things because they are too shy to lick you and show you their affection. Him chewing on the carpet could be his way of showing he cares about you or that you are his so to speak. My bunny occasionally damages my things like shoes but the damage is almost gentle. He has this thing when he unties my shoelaces on a new pair of shoes. I think it’s kind of funny, as if he is trying to remind me of his presence in case I have forgotten.
I hope your bunny gets used to the new layout of the room over the next couple of days and his nervous behaviour goes back to normal. 😉